protected void installDefaults() { LookAndFeel.installColorsAndFont( optionPane, "OptionPane.background", "OptionPane.foreground", "OptionPane.font"); LookAndFeel.installBorder(optionPane, "OptionPane.border"); minimumSize = UIManager.getDimension("OptionPane.minimumSize"); LookAndFeel.installProperty(optionPane, "opaque", Boolean.TRUE); }